By Yannis Manolopoulos
Advanced Database Indexing starts off via introducing simple fabric on garage media, together with magnetic disks, RAID platforms and tertiary garage equivalent to optical disk and tapes. regular entry tools (e.g. B+ timber, dynamic hash records and secondary key retrieval) also are brought. the rest of the booklet discusses fresh advances in indexing and entry tools for specific database purposes. extra in particular, matters similar to exterior sorting, dossier buildings for periods, temporal entry equipment, spatial and spatio-temporal indexing, photo and multimedia indexing, ideal exterior hashing tools, parallel entry equipment, concurrency concerns in indexing and parallel exterior sorting are offered for the 1st time in one e-book.
Advanced Database Indexing is a superb reference for database pros and should be used as a textual content for complex classes at the subject.
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Additional info for Advanced Database Indexing (Advances in Database Systems)
Combining merging steps. The described procedure can be easily generalized by splitting the merge phase into sub-spaces in a recursive manner. This might be the case when, for example, after a memory reduction, another one follows. Then, a substep created from the fIrst reduction may be recursively split into several sub-steps. , 1993]. Also, dynamic splitting can take better advantage of a possible available memory increase, as well as being able to respond better to the magnitude of the memory change.
The most widely used indexing scheme is the B+-tree. Hashing is also common, in particular in its Extendible and Linear Hashing schemes. We also describe two multiattribute access methods, the k-d tree and the Grid File. Finally, we discuss an approach that is popular for document searching, the Inverted File. 1. INTRODUCTION An access method is a data structure that enables fast access over the records of a database file. Consider for example an Employee file that contains employee records; each record has a number of attributes, for example: ssn, name, salary, dept, address.
36 ADVANCED DATABASE INDEXING Zhang, W. A. (1997). Dynamic Memory Adjustment for External Mergesort. In Proceedings of the 23,rl International Conference on Very Large Data Bases, pages 376385. Zhang, W. A. (1998). Buffering and Read-Ahead Strategies for External Mergesort. Proceedings of the 24,h International Conference on Very Large Data Bases, pages 523-533. Zheng, L. A. (1996). Speeding up External Mergesort. IEEE Transactions on Knowledge and Data Engineering, 8(2):322-332. , blocks or pages transferred) between the disk and main memory.